When the front circle reaches a certain height, it not only affects the fire, but also reduces the ventilation area, affects the complete combustion of pulverized coal, and prevents the kiln skin and the lining from being damaged after the large pieces and materials are piled up. Due to the height of the circle and the material regulations, the fire is generally bright, and the thicker material has a sticky feeling, which often cannot be controlled normally. The wind speed is high. The black fire head is elongated, and it is found that the black shadow is late, which is likely to cause waste from the large slow train and reduce the production quality.
The formation of such a circle is generally caused by the flame over working, the burning zone moves backward, the clinker is slowly cooled or the pulverized coal is settled, and the material from the burning zone contains more liquid phase. Because the front ring is long at the junction of the firing zone and the cooling zone, it can be directly burned with a flame, so changing the flame position can be solved.
There are two methods of processing the front circle: slow burning and rapid burning. Slow burning is to burn off the ring in a long time. It is suitable for the situation that the front ring and the kiln skin inside the ring are not good. Rapid burning is to burn the ring in a short time. This method is suitable for the front knot that grows inside. Slow burning is similar to fast burning, except that the length of the burn time is different from the size of the wind.
When the front circle is rapidly burned, the general exhaust is smaller, the tail temperature drops more, and even the kiln speed fluctuates. In the slow-burning front circle, the exhaust air is larger, which has almost no effect on normal calcination. When pulling back the coal pipe, shorten or change the flame position, use the exhaust air to control.